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<?php
/**
* Core Translation API
*
* @package WordPress
* @subpackage i18n
* @since 1.2.0
*/
/**
* Retrieves the current locale.
*
* If the locale is set, then it will filter the locale in the {@see 'locale'}
* filter hook and return the value.
*
* If the locale is not set already, then the WPLANG constant is used if it is
* defined. Then it is filtered through the {@see 'locale'} filter hook and
* the value for the locale global set and the locale is returned.
*
* The process to get the locale should only be done once, but the locale will
* always be filtered using the {@see 'locale'} hook.
*
* @since 1.5.0
*
* @global string $locale
* @global string $wp_local_package
*
* @return string The locale of the blog or from the {@see 'locale'} hook.
*/
function get_locale() {
global $locale, $wp_local_package;
if ( isset( $locale ) ) {
/**
* Filter WordPress install's locale ID.
*
* @since 1.5.0
*
* @param string $locale The locale ID.
*/
return apply_filters( 'locale', $locale );
}
if ( isset( $wp_local_package ) ) {
$locale = $wp_local_package;
}
// WPLANG was defined in wp-config.
if ( defined( 'WPLANG' ) ) {
$locale = WPLANG;
}
// If multisite, check options.
if ( is_multisite() ) {
// Don't check blog option when installing.
if ( wp_installing() || ( false === $ms_locale = get_option( 'WPLANG' ) ) ) {
$ms_locale = get_site_option( 'WPLANG' );
}
if ( $ms_locale !== false ) {
$locale = $ms_locale;
}
} else {
$db_locale = get_option( 'WPLANG' );
if ( $db_locale !== false ) {
$locale = $db_locale;
}
}
if ( empty( $locale ) ) {
$locale = 'en_US';
}
/** This filter is documented in wp-includes/l10n.php */
return apply_filters( 'locale', $locale );
}
/**
* Retrieve the translation of $text.
*
* If there is no translation, or the text domain isn't loaded, the original text is returned.
*
* *Note:* Don't use translate() directly, use __() or related functions.
*
* @since 2.2.0
*
* @param string $text Text to translate.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated text
*/
function translate( $text, $domain = 'default' ) {
$translations = get_translations_for_domain( $domain );
$translations = $translations->translate( $text );
/**
* Filter text with its translation.
*
* @since 2.0.11
*
* @param string $translations Translated text.
* @param string $text Text to translate.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
return apply_filters( 'gettext', $translations, $text, $domain );
}
/**
* Remove last item on a pipe-delimited string.
*
* Meant for removing the last item in a string, such as 'Role name|User role'. The original
* string will be returned if no pipe '|' characters are found in the string.
*
* @since 2.8.0
*
* @param string $string A pipe-delimited string.
* @return string Either $string or everything before the last pipe.
*/
function before_last_bar( $string ) {
$last_bar = strrpos( $string, '|' );
if ( false === $last_bar )
return $string;
else
return substr( $string, 0, $last_bar );
}
/**
* Retrieve the translation of $text in the context defined in $context.
*
* If there is no translation, or the text domain isn't loaded the original
* text is returned.
*
* *Note:* Don't use translate_with_gettext_context() directly, use _x() or related functions.
*
* @since 2.8.0
*
* @param string $text Text to translate.
* @param string $context Context information for the translators.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated text on success, original text on failure.
*/
function translate_with_gettext_context( $text, $context, $domain = 'default' ) {
$translations = get_translations_for_domain( $domain );
$translations = $translations->translate( $text, $context );
/**
* Filter text with its translation based on context information.
*
* @since 2.8.0
*
* @param string $translations Translated text.
* @param string $text Text to translate.
* @param string $context Context information for the translators.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
return apply_filters( 'gettext_with_context', $translations, $text, $context, $domain );
}
/**
* Retrieve the translation of $text.
*
* If there is no translation, or the text domain isn't loaded, the original text is returned.
*
* @since 2.1.0
*
* @param string $text Text to translate.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated text.
*/
function __( $text, $domain = 'default' ) {
return translate( $text, $domain );
}
/**
* Retrieve the translation of $text and escapes it for safe use in an attribute.
*
* If there is no translation, or the text domain isn't loaded, the original text is returned.
*
* @since 2.8.0
*
* @param string $text Text to translate.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated text on success, original text on failure.
*/
function esc_attr__( $text, $domain = 'default' ) {
return esc_attr( translate( $text, $domain ) );
}
/**
* Retrieve the translation of $text and escapes it for safe use in HTML output.
*
* If there is no translation, or the text domain isn't loaded, the original text is returned.
*
* @since 2.8.0
*
* @param string $text Text to translate.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated text
*/
function esc_html__( $text, $domain = 'default' ) {
return esc_html( translate( $text, $domain ) );
}
/**
* Display translated text.
*
* @since 1.2.0
*
* @param string $text Text to translate.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
*/
function _e( $text, $domain = 'default' ) {
echo translate( $text, $domain );
}
/**
* Display translated text that has been escaped for safe use in an attribute.
*
* @since 2.8.0
*
* @param string $text Text to translate.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
*/
function esc_attr_e( $text, $domain = 'default' ) {
echo esc_attr( translate( $text, $domain ) );
}
/**
* Display translated text that has been escaped for safe use in HTML output.
*
* @since 2.8.0
*
* @param string $text Text to translate.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
*/
function esc_html_e( $text, $domain = 'default' ) {
echo esc_html( translate( $text, $domain ) );
}
/**
* Retrieve translated string with gettext context.
*
* Quite a few times, there will be collisions with similar translatable text
* found in more than two places, but with different translated context.
*
* By including the context in the pot file, translators can translate the two
* strings differently.
*
* @since 2.8.0
*
* @param string $text Text to translate.
* @param string $context Context information for the translators.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated context string without pipe.
*/
function _x( $text, $context, $domain = 'default' ) {
return translate_with_gettext_context( $text, $context, $domain );
}
/**
* Display translated string with gettext context.
*
* @since 3.0.0
*
* @param string $text Text to translate.
* @param string $context Context information for the translators.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated context string without pipe.
*/
function _ex( $text, $context, $domain = 'default' ) {
echo _x( $text, $context, $domain );
}
/**
* Translate string with gettext context, and escapes it for safe use in an attribute.
*
* @since 2.8.0
*
* @param string $text Text to translate.
* @param string $context Context information for the translators.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated text
*/
function esc_attr_x( $text, $context, $domain = 'default' ) {
return esc_attr( translate_with_gettext_context( $text, $context, $domain ) );
}
/**
* Translate string with gettext context, and escapes it for safe use in HTML output.
*
* @since 2.9.0
*
* @param string $text Text to translate.
* @param string $context Context information for the translators.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string Translated text.
*/
function esc_html_x( $text, $context, $domain = 'default' ) {
return esc_html( translate_with_gettext_context( $text, $context, $domain ) );
}
/**
* Translates and retrieves the singular or plural form based on the supplied number.
*
* Used when you want to use the appropriate form of a string based on whether a
* number is singular or plural.
*
* Example:
*
* $people = sprintf( _n( '%s person', '%s people', $count, 'text-domain' ), number_format_i18n( $count ) );
*
* @since 2.8.0
*
* @param string $single The text to be used if the number is singular.
* @param string $plural The text to be used if the number is plural.
* @param int $number The number to compare against to use either the singular or plural form.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string The translated singular or plural form.
*/
function _n( $single, $plural, $number, $domain = 'default' ) {
$translations = get_translations_for_domain( $domain );
$translation = $translations->translate_plural( $single, $plural, $number );
/**
* Filter the singular or plural form of a string.
*
* @since 2.2.0
*
* @param string $translation Translated text.
* @param string $single The text to be used if the number is singular.
* @param string $plural The text to be used if the number is plural.
* @param string $number The number to compare against to use either the singular or plural form.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
return apply_filters( 'ngettext', $translation, $single, $plural, $number, $domain );
}
/**
* Translates and retrieves the singular or plural form based on the supplied number, with gettext context.
*
* This is a hybrid of _n() and _x(). It supports context and plurals.
*
* Used when you want to use the appropriate form of a string with context based on whether a
* number is singular or plural.
*
* Example:
*
* $people = sprintf( _n( '%s person', '%s people', $count, 'context', 'text-domain' ), number_format_i18n( $count ) );
*
* @since 2.8.0
*
* @param string $single The text to be used if the number is singular.
* @param string $plural The text to be used if the number is plural.
* @param int $number The number to compare against to use either the singular or plural form.
* @param string $context Context information for the translators.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default 'default'.
* @return string The translated singular or plural form.
*/
function _nx($single, $plural, $number, $context, $domain = 'default') {
$translations = get_translations_for_domain( $domain );
$translation = $translations->translate_plural( $single, $plural, $number, $context );
/**
* Filter the singular or plural form of a string with gettext context.
*
* @since 2.8.0
*
* @param string $translation Translated text.
* @param string $single The text to be used if the number is singular.
* @param string $plural The text to be used if the number is plural.
* @param string $number The number to compare against to use either the singular or plural form.
* @param string $context Context information for the translators.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
return apply_filters( 'ngettext_with_context', $translation, $single, $plural, $number, $context, $domain );
}
/**
* Registers plural strings in POT file, but don't translate them.
*
* Used when you want to keep structures with translatable plural
* strings and use them later when the number is known.
*
* Example:
*
* $messages = array(
* 'post' => _n_noop( '%s post', '%s posts', 'text-domain' ),
* 'page' => _n_noop( '%s pages', '%s pages', 'text-domain' ),
* );
* ...
* $message = $messages[ $type ];
* $usable_text = sprintf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
*
* @since 2.5.0
*
* @param string $singular Singular form to be localized.
* @param string $plural Plural form to be localized.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default null.
* @return array {
* Array of translation information for the strings.
*
* @type string $0 Singular form to be localized. No longer used.
* @type string $1 Plural form to be localized. No longer used.
* @type string $singular Singular form to be localized.
* @type string $plural Plural form to be localized.
* @type null $context Context information for the translators.
* @type string $domain Text domain.
* }
*/
function _n_noop( $singular, $plural, $domain = null ) {
return array( 0 => $singular, 1 => $plural, 'singular' => $singular, 'plural' => $plural, 'context' => null, 'domain' => $domain );
}
/**
* Register plural strings with gettext context in the POT file, but don't translate them.
*
* Used when you want to keep structures with translatable plural
* strings and use them later when the number is known.
*
* Example:
*
* $messages = array(
* 'post' => _n_noop( '%s post', '%s posts', 'context', 'text-domain' ),
* 'page' => _n_noop( '%s pages', '%s pages', 'context', 'text-domain' ),
* );
* ...
* $message = $messages[ $type ];
* $usable_text = sprintf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
*
* @since 2.8.0
*
* @param string $singular Singular form to be localized.
* @param string $plural Plural form to be localized.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
* Default null.
* @return array {
* Array of translation information for the strings.
*
* @type string $0 Singular form to be localized. No longer used.
* @type string $1 Plural form to be localized. No longer used.
* @type string $2 Context information for the translators. No longer used.
* @type string $singular Singular form to be localized.
* @type string $plural Plural form to be localized.
* @type string $context Context information for the translators.
* @type string $domain Text domain.
* }
*/
function _nx_noop( $singular, $plural, $context, $domain = null ) {
return array( 0 => $singular, 1 => $plural, 2 => $context, 'singular' => $singular, 'plural' => $plural, 'context' => $context, 'domain' => $domain );
}
/**
* Translates and retrieves the singular or plural form of a string that's been registered
* with _n_noop() or _nx_noop().
*
* Used when you want to use a translatable plural string once the number is known.
*
* Example:
*
* $messages = array(
* 'post' => _n_noop( '%s post', '%s posts', 'text-domain' ),
* 'page' => _n_noop( '%s pages', '%s pages', 'text-domain' ),
* );
* ...
* $message = $messages[ $type ];
* $usable_text = sprintf( translate_nooped_plural( $message, $count, 'text-domain' ), number_format_i18n( $count ) );
*
* @since 3.1.0
*
* @param array $nooped_plural Array with singular, plural, and context keys, usually the result of _n_noop() or _nx_noop().
* @param int $count Number of objects.
* @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings. If $nooped_plural contains
* a text domain passed to _n_noop() or _nx_noop(), it will override this value. Default 'default'.
* @return string Either $single or $plural translated text.
*/
function translate_nooped_plural( $nooped_plural, $count, $domain = 'default' ) {
if ( $nooped_plural['domain'] )
$domain = $nooped_plural['domain'];
if ( $nooped_plural['context'] )
return _nx( $nooped_plural['singular'], $nooped_plural['plural'], $count, $nooped_plural['context'], $domain );
else
return _n( $nooped_plural['singular'], $nooped_plural['plural'], $count, $domain );
}
/**
* Load a .mo file into the text domain $domain.
*
* If the text domain already exists, the translations will be merged. If both
* sets have the same string, the translation from the original value will be taken.
*
* On success, the .mo file will be placed in the $l10n global by $domain
* and will be a MO object.
*
* @since 1.5.0
*
* @global array $l10n
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @param string $mofile Path to the .mo file.
* @return bool True on success, false on failure.
*/
function load_textdomain( $domain, $mofile ) {
global $l10n;
/**
* Filter text domain and/or MO file path for loading translations.
*
* @since 2.9.0
*
* @param bool $override Whether to override the text domain. Default false.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @param string $mofile Path to the MO file.
*/
$plugin_override = apply_filters( 'override_load_textdomain', false, $domain, $mofile );
if ( true == $plugin_override ) {
return true;
}
/**
* Fires before the MO translation file is loaded.
*
* @since 2.9.0
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @param string $mofile Path to the .mo file.
*/
do_action( 'load_textdomain', $domain, $mofile );
/**
* Filter MO file path for loading translations for a specific text domain.
*
* @since 2.9.0
*
* @param string $mofile Path to the MO file.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
$mofile = apply_filters( 'load_textdomain_mofile', $mofile, $domain );
if ( !is_readable( $mofile ) ) return false;
$mo = new MO();
if ( !$mo->import_from_file( $mofile ) ) return false;
if ( isset( $l10n[$domain] ) )
$mo->merge_with( $l10n[$domain] );
$l10n[$domain] = &$mo;
return true;
}
/**
* Unload translations for a text domain.
*
* @since 3.0.0
*
* @global array $l10n
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @return bool Whether textdomain was unloaded.
*/
function unload_textdomain( $domain ) {
global $l10n;
/**
* Filter the text domain for loading translation.
*
* @since 3.0.0
*
* @param bool $override Whether to override unloading the text domain. Default false.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
$plugin_override = apply_filters( 'override_unload_textdomain', false, $domain );
if ( $plugin_override )
return true;
/**
* Fires before the text domain is unloaded.
*
* @since 3.0.0
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
do_action( 'unload_textdomain', $domain );
if ( isset( $l10n[$domain] ) ) {
unset( $l10n[$domain] );
return true;
}
return false;
}
/**
* Load default translated strings based on locale.
*
* Loads the .mo file in WP_LANG_DIR constant path from WordPress root.
* The translated (.mo) file is named based on the locale.
*
* @see load_textdomain()
*
* @since 1.5.0
*
* @param string $locale Optional. Locale to load. Default is the value of {@see get_locale()}.
* @return bool Whether the textdomain was loaded.
*/
function load_default_textdomain( $locale = null ) {
if ( null === $locale ) {
$locale = get_locale();
}
// Unload previously loaded strings so we can switch translations.
unload_textdomain( 'default' );
$return = load_textdomain( 'default', WP_LANG_DIR . "/$locale.mo" );
if ( ( is_multisite() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) ) && ! file_exists( WP_LANG_DIR . "/admin-$locale.mo" ) ) {
load_textdomain( 'default', WP_LANG_DIR . "/ms-$locale.mo" );
return $return;
}
if ( is_admin() || wp_installing() || ( defined( 'WP_REPAIRING' ) && WP_REPAIRING ) ) {
load_textdomain( 'default', WP_LANG_DIR . "/admin-$locale.mo" );
}
if ( is_network_admin() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) )
load_textdomain( 'default', WP_LANG_DIR . "/admin-network-$locale.mo" );
return $return;
}
/**
* Load a plugin's translated strings.
*
* If the path is not given then it will be the root of the plugin directory.
*
* The .mo file should be named based on the text domain with a dash, and then the locale exactly.
*
* @since 1.5.0
*
* @param string $domain Unique identifier for retrieving translated strings
* @param string $deprecated Use the $plugin_rel_path parameter instead.
* @param string $plugin_rel_path Optional. Relative path to WP_PLUGIN_DIR where the .mo file resides.
* Default false.
* @return bool True when textdomain is successfully loaded, false otherwise.
*/
function load_plugin_textdomain( $domain, $deprecated = false, $plugin_rel_path = false ) {
$locale = get_locale();
/**
* Filter a plugin's locale.
*
* @since 3.0.0
*
* @param string $locale The plugin's current locale.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
$locale = apply_filters( 'plugin_locale', $locale, $domain );
if ( false !== $plugin_rel_path ) {
$path = WP_PLUGIN_DIR . '/' . trim( $plugin_rel_path, '/' );
} elseif ( false !== $deprecated ) {
_deprecated_argument( __FUNCTION__, '2.7' );
$path = ABSPATH . trim( $deprecated, '/' );
} else {
$path = WP_PLUGIN_DIR;
}
// Load the textdomain according to the plugin first
$mofile = $domain . '-' . $locale . '.mo';
if ( $loaded = load_textdomain( $domain, $path . '/'. $mofile ) )
return $loaded;
// Otherwise, load from the languages directory
$mofile = WP_LANG_DIR . '/plugins/' . $mofile;
return load_textdomain( $domain, $mofile );
}
/**
* Load the translated strings for a plugin residing in the mu-plugins directory.
*
* @since 3.0.0
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @param string $mu_plugin_rel_path Relative to WPMU_PLUGIN_DIR directory in which the .mo file resides.
* Default empty string.
* @return bool True when textdomain is successfully loaded, false otherwise.
*/
function load_muplugin_textdomain( $domain, $mu_plugin_rel_path = '' ) {
/** This filter is documented in wp-includes/l10n.php */
$locale = apply_filters( 'plugin_locale', get_locale(), $domain );
$path = trailingslashit( WPMU_PLUGIN_DIR . '/' . ltrim( $mu_plugin_rel_path, '/' ) );
// Load the textdomain according to the plugin first
$mofile = $domain . '-' . $locale . '.mo';
if ( $loaded = load_textdomain( $domain, $path . $mofile ) )
return $loaded;
// Otherwise, load from the languages directory
$mofile = WP_LANG_DIR . '/plugins/' . $mofile;
return load_textdomain( $domain, $mofile );
}
/**
* Load the theme's translated strings.
*
* If the current locale exists as a .mo file in the theme's root directory, it
* will be included in the translated strings by the $domain.
*
* The .mo files must be named based on the locale exactly.
*
* @since 1.5.0
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @param string $path Optional. Path to the directory containing the .mo file.
* Default false.
* @return bool True when textdomain is successfully loaded, false otherwise.
*/
function load_theme_textdomain( $domain, $path = false ) {
$locale = get_locale();
/**
* Filter a theme's locale.
*
* @since 3.0.0
*
* @param string $locale The theme's current locale.
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
*/
$locale = apply_filters( 'theme_locale', $locale, $domain );
if ( ! $path )
$path = get_template_directory();
// Load the textdomain according to the theme
$mofile = untrailingslashit( $path ) . "/{$locale}.mo";
if ( $loaded = load_textdomain( $domain, $mofile ) )
return $loaded;
// Otherwise, load from the languages directory
$mofile = WP_LANG_DIR . "/themes/{$domain}-{$locale}.mo";
return load_textdomain( $domain, $mofile );
}
/**
* Load the child themes translated strings.
*
* If the current locale exists as a .mo file in the child themes
* root directory, it will be included in the translated strings by the $domain.
*
* The .mo files must be named based on the locale exactly.
*
* @since 2.9.0
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @param string $path Optional. Path to the directory containing the .mo file.
* Default false.
* @return bool True when the theme textdomain is successfully loaded, false otherwise.
*/
function load_child_theme_textdomain( $domain, $path = false ) {
if ( ! $path )
$path = get_stylesheet_directory();
return load_theme_textdomain( $domain, $path );
}
/**
* Return the Translations instance for a text domain.
*
* If there isn't one, returns empty Translations instance.
*
* @since 2.8.0
*
* @global array $l10n
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @return NOOP_Translations A Translations instance.
*/
function get_translations_for_domain( $domain ) {
global $l10n;
if ( !isset( $l10n[$domain] ) ) {
$l10n[$domain] = new NOOP_Translations;
}
return $l10n[$domain];
}
/**
* Whether there are translations for the text domain.
*
* @since 3.0.0
*
* @global array $l10n
*
* @param string $domain Text domain. Unique identifier for retrieving translated strings.
* @return bool Whether there are translations.
*/
function is_textdomain_loaded( $domain ) {
global $l10n;
return isset( $l10n[$domain] );
}
/**
* Translates role name.
*
* Since the role names are in the database and not in the source there
* are dummy gettext calls to get them into the POT file and this function
* properly translates them back.
*
* The before_last_bar() call is needed, because older installs keep the roles
* using the old context format: 'Role name|User role' and just skipping the
* content after the last bar is easier than fixing them in the DB. New installs
* won't suffer from that problem.
*
* @since 2.8.0
*
* @param string $name The role name.
* @return string Translated role name on success, original name on failure.
*/
function translate_user_role( $name ) {
return translate_with_gettext_context( before_last_bar($name), 'User role' );
}
/**
* Get all available languages based on the presence of *.mo files in a given directory.
*
* The default directory is WP_LANG_DIR.
*
* @since 3.0.0
*
* @param string $dir A directory to search for language files.
* Default WP_LANG_DIR.
* @return array An array of language codes or an empty array if no languages are present. Language codes are formed by stripping the .mo extension from the language file names.
*/
function get_available_languages( $dir = null ) {
$languages = array();
$lang_files = glob( ( is_null( $dir) ? WP_LANG_DIR : $dir ) . '/*.mo' );
if ( $lang_files ) {
foreach ( $lang_files as $lang_file ) {
$lang_file = basename( $lang_file, '.mo' );
if ( 0 !== strpos( $lang_file, 'continents-cities' ) && 0 !== strpos( $lang_file, 'ms-' ) &&
0 !== strpos( $lang_file, 'admin-' ) ) {
$languages[] = $lang_file;
}
}
}
return $languages;
}
/**
* Get installed translations.
*
* Looks in the wp-content/languages directory for translations of
* plugins or themes.
*
* @since 3.7.0
*
* @param string $type What to search for. Accepts 'plugins', 'themes', 'core'.
* @return array Array of language data.
*/
function wp_get_installed_translations( $type ) {
if ( $type !== 'themes' && $type !== 'plugins' && $type !== 'core' )
return array();
$dir = 'core' === $type ? '' : "/$type";
if ( ! is_dir( WP_LANG_DIR ) )
return array();
if ( $dir && ! is_dir( WP_LANG_DIR . $dir ) )
return array();
$files = scandir( WP_LANG_DIR . $dir );
if ( ! $files )
return array();
$language_data = array();
foreach ( $files as $file ) {
if ( '.' === $file[0] || is_dir( $file ) ) {
continue;
}
if ( substr( $file, -3 ) !== '.po' ) {
continue;
}
if ( ! preg_match( '/(?:(.+)-)?([a-z]{2,3}(?:_[A-Z]{2})?(?:_[a-z0-9]+)?).po/', $file, $match ) ) {
continue;
}
if ( ! in_array( substr( $file, 0, -3 ) . '.mo', $files ) ) {
continue;
}
list( , $textdomain, $language ) = $match;
if ( '' === $textdomain ) {
$textdomain = 'default';
}
$language_data[ $textdomain ][ $language ] = wp_get_pomo_file_data( WP_LANG_DIR . "$dir/$file" );
}
return $language_data;
}
/**
* Extract headers from a PO file.
*
* @since 3.7.0
*
* @param string $po_file Path to PO file.
* @return array PO file headers.
*/
function wp_get_pomo_file_data( $po_file ) {
$headers = get_file_data( $po_file, array(
'POT-Creation-Date' => '"POT-Creation-Date',
'PO-Revision-Date' => '"PO-Revision-Date',
'Project-Id-Version' => '"Project-Id-Version',
'X-Generator' => '"X-Generator',
) );
foreach ( $headers as $header => $value ) {
// Remove possible contextual '\n' and closing double quote.
$headers[ $header ] = preg_replace( '~(\\\n)?"$~', '', $value );
}
return $headers;
}
/**
* Language selector.
*
* @since 4.0.0
* @since 4.3.0 Introduced the `echo` argument.
*
* @see get_available_languages()
* @see wp_get_available_translations()
*
* @param string|array $args {
* Optional. Array or string of arguments for outputting the language selector.
*
* @type string $id ID attribute of the select element. Default empty.
* @type string $name Name attribute of the select element. Default empty.
* @type array $languages List of installed languages, contain only the locales.
* Default empty array.
* @type array $translations List of available translations. Default result of
* wp_get_available_translations().
* @type string $selected Language which should be selected. Default empty.
* @type bool|int $echo Whether to echo or return the generated markup. Accepts 0, 1, or their
* bool equivalents. Default 1.
* @type bool $show_available_translations Whether to show available translations. Default true.
* }
* @return string HTML content only if 'echo' argument is 0.
*/
function wp_dropdown_languages( $args = array() ) {
$args = wp_parse_args( $args, array(
'id' => '',
'name' => '',
'languages' => array(),
'translations' => array(),
'selected' => '',
'echo' => 1,
'show_available_translations' => true,
) );
$translations = $args['translations'];
if ( empty( $translations ) ) {
require_once( ABSPATH . 'wp-admin/includes/translation-install.php' );
$translations = wp_get_available_translations();
}
/*
* $args['languages'] should only contain the locales. Find the locale in
* $translations to get the native name. Fall back to locale.
*/
$languages = array();
foreach ( $args['languages'] as $locale ) {
if ( isset( $translations[ $locale ] ) ) {
$translation = $translations[ $locale ];
$languages[] = array(
'language' => $translation['language'],
'native_name' => $translation['native_name'],
'lang' => current( $translation['iso'] ),
);
// Remove installed language from available translations.
unset( $translations[ $locale ] );
} else {
$languages[] = array(
'language' => $locale,
'native_name' => $locale,
'lang' => '',
);
}
}
$translations_available = ( ! empty( $translations ) && $args['show_available_translations'] );
$output = sprintf( '<select name="%s" id="%s">', esc_attr( $args['name'] ), esc_attr( $args['id'] ) );
// Holds the HTML markup.
$structure = array();
// List installed languages.
if ( $translations_available ) {
$structure[] = '<optgroup label="' . esc_attr_x( 'Installed', 'translations' ) . '">';
}
$structure[] = '<option value="" lang="en" data-installed="1">English (United States)</option>';
foreach ( $languages as $language ) {
$structure[] = sprintf(
'<option value="%s" lang="%s"%s data-installed="1">%s</option>',
esc_attr( $language['language'] ),
esc_attr( $language['lang'] ),
selected( $language['language'], $args['selected'], false ),
esc_html( $language['native_name'] )
);
}
if ( $translations_available ) {
$structure[] = '</optgroup>';
}
// List available translations.
if ( $translations_available ) {
$structure[] = '<optgroup label="' . esc_attr_x( 'Available', 'translations' ) . '">';
foreach ( $translations as $translation ) {
$structure[] = sprintf(
'<option value="%s" lang="%s"%s>%s</option>',
esc_attr( $translation['language'] ),
esc_attr( current( $translation['iso'] ) ),
selected( $translation['language'], $args['selected'], false ),
esc_html( $translation['native_name'] )
);
}
$structure[] = '</optgroup>';
}
$output .= join( "\n", $structure );
$output .= '</select>';
if ( $args['echo'] ) {
echo $output;
}
return $output;
}
